Combined transformer and rectifier



E. B STACK.

COMBINED TRANSFORMER AND RECTIFIER.

APPUCATION FILED JULY 22, I928.

1 ,3 1 6, 546 Patented Sept. 16, 1919.

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E. B. STACK. COMBINED TRANSFORMER AND RECTIFIER. APPLICATION man mu 22.1912.

1 16,546. PatentedSept. 16, 1919.

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j awwlwba'c thug-M if I I 4 Vc 9 EBVIN B. STACK, MONROE, NORTH CAROLINA.

- COMBINED TRANSFORMER AND RECTIFIER.

Specification of Letters Patent.

Patented Sept. 16, 1919.

Application filed. Jul 22, 1918. Serial No. menu.

To all whom it may concern Be it known that I; Envm B. $rnox, a citizen offthe United States, residing at Monroe in the county of Union and State of North arolina, have invented certain new and useful Improvements in Combined Transformers and Rectifiers; and I do declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which -it appertains to make and use the same.

This invention relates to a combined magnetic transformer and rectifier, and itrelates more articularly to an improved comp'act porta'le device for transformin and rectifying a current of electricity and c arg ing a storage battery or other translatin device with the transformed and'rectiti current.

One object of this invention is to provide a thoroughly ractical transformer and rectifier which is portable and may be carried by hand or in an automobile as a single unit from one soureeof E. M. F. to another, so that thestorage batter of the automobile can be charged at anylp ace where an ordinary electric lamp-socket is accessible.

' changing A furtherobjeet of this invention is to provide a device of this character whereby a high voltagenalternating current may be emp oyed to charge a storage battery, by convertin this current into a direct current of low vo tage.

A further object of the invention is to shunt a part of the low voltage or transformed current and utilize the same for the polarity of an electromagnetcore wit the-same frequency of the alternating current, and thereby changing the polarity of a vibrator which operates between two opposing contacts and cooperates therewith to rectify the current, and also constitutcs an element of the conductor that connects the transformer with the storage battcry to be charged.

Another object of the invention is to intcrpose fuses in the circuit between the shunt and the vibrator so. as to obtain the maximum safetyof the vibrator. 7

Other objects and advantages may become apparent to persons who read the following details of description in connection with the Fig. 2 is a front elevation of the device, the casing being shown in vertical section;

Fig. 3 1s a side elevation, the casing in ver-' tical section;

Fig. 4 is an end elevation, the casing in vertical section;

Fig. 5 is a top omitted; and,

Fig. 6 is an 'enlar d detail view in vertical section along t e line 66 of Fi 5.

Referrin to these drawings in detai in which similar reference characters correspond to similar parts throu bout the several views, and especially to lg. 1,'the numeral '7 represents generally a transformer plan, the casing being consisting of a primary coil 8 and two 'se'condary'coils 9'and 10, the primary coil belng located between the secondary'coils and bclng connectible to an ordinary lampsocket through the medium of a plug 11 and connections 12. These coils surround a core 13 through the medium of which a current is induced in the secondary coils by the pri mary coil, the windings of the primary coil being so related to those of the secondary coils thata high voltage (say '110 v.)' in the former induces a relatively low voltage (say 15 v.) in the latter.

The transformer is arranged in a suitable frame-which comprises uprights or posts 14, a base or lower supporting plate 15, and an upper supporting plate 16, both plates being preferably of insulating material. U nthe plate 16 is disposed a slab 17 of s ate or other fire proof insulation, and on this slab is secured a pair of holders and adjusters 18, each of which carries a carbon contact 19', these contacts being adjustable by means of screws 20 which are provided with lock-nuts 21 that hold them in adjustment.

Adjacent to the contact holders 18 is a permanent magnet 22 of the horse-shoe type that is supported on and secured to the plate 16 by means of corner-brackets 23. The mag net 22 is relatively long and narrow, and extends through slots in one edge of the plate 16, and its poles project above the plate 16 while its bight portion extends. below this plate: and by this arrangement. the combination ofelcmcnts is rendered very compact. Bolts 24 extend up through the tubular )osts or uprights l4 and coiipcratc with nuts t 161'?" on for securing the parts of the main framc togcthcr and for securing the brackets 23 in place.

An clcctro-magucl 25 is scoured on the plate 16 and consists of a coil 26 and a laminated core 27, the latter being preferably formed of soft iron strips bolted together as shown in Fig. 5. v

The vibrator 28 is secured to one end of the core 27 and extends between the carbon contacts 19 and the poles of the permanent magnet 22. This vibrator preferabl consists of a 3 ring steel strip provide with laterals 29 t at are also of steel and are quite flexible and resilient so as to cushion the strokes of the vibrator, and each element 29 is provided with a copper contact plate that makes and breaks circuit with the corresponding contacts 19. The other end of the core 27 has a conductor 30 connected thereto and this conductor is also connected to one arm of a switch 31 which has its arms connected by a non-conducting connector 32. The other arm of this swltch is connected to the sccondarv coils 9 and 10 through the medium of a con nctor 33 which is branched or divided at 34 as shown in Fig. 1. Conductors 35 and 36 connect the corres nding brushes 19 with the secondary coil: and each of these conductors has a fuse 37 interposed therein at a safe distance from the coil 26 and vibrator 28, so as not to detrimentally all'ect these parts when the fuse blows out.

Conductors 38 and 39 combine with the coil 26 to form a shunt across the secondary circuit, viz., the circuit which comprises the secondary coils 9 and 10, brushes 19 and conductois 35 and 36; and the alternating current flows alternately in opposite directions through this shunt and changes the clarity of the core 27 and armature or vilirator 28 with each alternation of the current so that the vibrator is attracted alternatcly by the N. and S. poles of the permanent magnet 22.

A storagebattery 40 is connected to stationary contacts 41 through the medium of conductors 42 and 43, the latter having a rhcostat 44 and an annneter -15 interposed therein.

Considered broadly, the secondary coils 9, 16, and the branch wire or connection 34, being directly connected in series, may properly be termed a conductor having the conducting elements 35 and 36 as its terminal portions, including the fuses 37 and the terminal contacts 19: also, the conducting elements as, 31, 42, 40, 4s, 45, 44, and 30, being directly connected in series with one another and with the core 27 and vibrator 28, may be properly termed a conductor, and this latter conductor is connectible in parallel with that which includes the secondary coils, through the medium of the vibrator. The coil 26 combines with the shunt wires 38 and 39 to form a conductor which is continually connected in parallel with the conductor which includes the secondary coils.

In operation, assuming that an alternating current of 110 v. is carried by the primary coil 8, and that the secondar coils 9 and 10 have alternating currents of 15 v. each induced by the primary coil through the medium of the core 13; now, assume that an oscillation of the current from the secondary coils is following along the wire 35 toward the magnet 22; the shunt wires 39 and 38 conduct a part of the current throu h the coil 26, and the circuit is completetfthrough the wire 36 and the branch conductors t at meet at 84. This current throu h the coil 26 excites and polarizes the core 2 and armature 28 and the magnet 22 attracts it accordin to its polarit say with positive or nort polarity, where y the south pole of the magnet 22 draws the vibrator into electrical contact with the carbon 19 that is in connection with the wire 35, thereby closin the circuit between the secondary coils and the battery, through the medium of the conductor elements 35, 37, 19,28, 27, 30, 31, 41, 44, 45, 43, 42, a3 and 34.

Now the next succeeding oscillation of the current in the coils 9 and 10 flows along the wire 36 toward the magnet 22, and passes through the coil 26 in the direction opposite to that described in the foregoing, thereby changing the polarity of the core 27 and armature.28,so that the latter is now drawn by the;north pole of the magnet 22 into electrical contact with the conductor 36, so that the current now ceases to flow from the conductor 35 to the armature, but flows thereto from the conductor 36, the direction of flow through thearmature beingzdirect at all times.

eferring now to the specific construction and arrangement of parts it will be seen by reference to Fi 2 to 6 inclusive, that the transformer an rectifier are arranged'very compactl in a unitary device that can be carried handle 46bein provided on a casing 47 which rotccts t Ie electrical conductors and other e ements while guarding the operator and other persons against electric shocks. The casing is reticulated for the purpose of allowing the escape of any heat that may be generated therein. Any suitable means, as indicated at 48, may be employed for removably securing the casing to the main frame.

Referring to Fig. 6 it will be seen that the conductors 35 and 36 are connected to the carbons 19 through the medium of screws or bindin posts 59 which also serve to secure the car on holders 18 to the main frame. In Figs. 1, 3 and 6 it will be seen that the fuses 37 are dis osed on top of the plate 16, and between t shunt wires 38 and 39. This is not only convenient in replacin v fuses, but also minimizes the danger o overcharge at the contacts 19. The location of the fuses on e contacts 19 and y hand from place to place, a.

the outer edges of the plate 16, remote from the coil'26 and insulated from the transto the construction and arrangement of parts as s ecifically described in the foregoing, but f am entitled to modify my invention within the scope of the inventive idea disclosed'in the foregoing description and following claims:

-lVhat I claim as my invention is:

1. In an electric current rectifier, an alternating current conductor, comprising apair of terminal contacts, a second alternating current conductor, said second conductor including a magnetizing coil and being connected in parallel with the first said conductor, a horseshoe magnet, and a direct current conductor including a magnetizing core and a vibrator and being connectible in parallel with the first said alternating current conductor by means of said vibrator, said vibrator constituting a flexible extension of said core and projecting between the said terminal contacts and be tween the poles of said magnet, the said core being cooperative with said coil to change the polarity of said vibrator.

I 2. In a combined transformer and rectifier, an alternating current primary coil, an alternating current conductor including a secondary coil and a. pair of terminal contacts, an alternating current shunt including a'magnctizing coil, a horse-shoe magnet, and a direct current conductor. said primary coil being associated with said alternating.

conductor so as to induce a current of lower potential therein, said shunt being in parallel with said alternating current conductor, said direct current conductor including a magnetizing core and a vibrator, said vibrator being supported by said core and extending between said terminal contacts and between the poles of said magnet and adapted to connect with said contacts. said coil and core being cooperative for changing the polarity of said vibrator.

3. A combined transforn'ier and rectifier comprising an insulating plate, transformer coils, means supporting said transformer coils and supporting said insulating plate horizontally over said coils. a pair of opposing contacts on the top side of said plate,

a bi-pole magnet supported by said plate, a conducting coil supported on the upper side of said plate, a core through said conducting coil, a vibrator supported by said core and extendin between said contacts and between the po es of said magnet, conducting wires electrically connecting said transformer'coils with said opposing contacts, means electrically connecting said conducting wires with said conductip coil,

means whereby sai core and conductin and said this ormer coils may be electri caliy connected to a translating device. L

' 4, A combined transformer and rectifier comprising an insulating plate, transformer coils, means supporting said transformer coils and supporting said insulating late horizontally over said coils, 'a-pair 0 cpposing contacts on the-top of said plate, a relatively long and narrow'bi-pole magnet supported by said plate and extendin vertica ly above and below said insu ating plate, a conductin top side of said p ate, a core through said conducting coil, a. vibrator supported by.

said core and extending between said contacts and between the poles of said magnet, conducting wires electrically connecting said transformer coils with said opposin contacts, means electrically connecting sai conducting wires with said conductin coil, and conducting ,means whereby sai core and said transformer coils may be electrically connected to a translating device.

5. In a combined transformer and rectitier, an insulating and supportin plate, a relatively long and narrow bi-po e magnet extending longitudinally through one edge of said plate, a conducting coil su ported on one side of said plate, a-pair o opposing contacts between said conducting coil and the oles of said magnet, a core extending tlirough said conducting coil, a, vibrator supported by one end of said core and extending between said opposing contacts and the poles of said ma et, transformer coils on the opposite side of said insulating and su porting plate and secured thereto, 0011f uctors electrically connecting said transformer coils with said opposing contacts, conductors electrically connecting the terminals of said conducting coil respectively with the first said conductors, and con uctors electrically connecting said core with said transformer coils through the medium of a translating device.

6. In a portable device for transforming and rectifying an electric current, an insulatingand supporting plate, transformer coils on one side of said plate and fixed with relation thereto. a rectifying vibrator on the other side of said plate, a magnet extending transversely of said plate and supported thereby and effective to acnate said vibrator, conducting means electrically coil supported on the connecting said vibrator and translating coils in a manner to effect the transforming and rectifying of an electric current flowing therealong, a casingzto contain and protect the elements above named, and a dlamagnetic plate between said magnet and sald casinf.

7. n a portable device for transforming and rectif ing an electric current, auinsulating an su portin late, transformer coilson one si e of sai p ate and fixed with relation thereto, arectifying vibrator on the other side of said Rlate a magnet extendin transversel of 1d plate and sup orted thereby an efl'ective to actuate said v1 rator, pairs of binding posts extending through said plate adjacent ogposite edges, a fuse for each pair of said bmding posts and connected thereto and disposed on the same side of the plate with said vibrator and at a safe distance from the latter conductors electrically connecting one binding 0st of each pair with said transformer coi s, conducting means electrically connected to the other binding post of each air and terminating at 0 posite sides 0 said vibrator and adapte to be alternate] in and out of contact therewith, and eon ucting means electrically connecting said transformer coils to said vibrator.

In testimony whereof I have hereunto set my hand.

ERVIN B. STACK.

Witnesses:

HENRY BELK, G. E. Fww. 

